TW200944322A - Laser welding method - Google Patents

Abstract

An object of the present invention is to provide a laser welding method in which when a laser beam is made incident on a thin film, carbide generated by the heat of the laser beam is prevented from being ejected between respective metallic thin plates. In the present invention, it is configured such that in each of second conductive sections 43 made of a metallic thin plate, a slit 43b which extends from a welding position to the end of the second conductive section 43 is provided, and that the second conductive sections 43 are respectively welded to the terminals 20 by making the laser beam incident at the respective welding positions of the substrate 41 (thin film). Thereby, even when a resin at the laser beam incident portion is carbonized by the thermal energy of the laser beam and thereby the resin carbide is ejected from the welding portion, it is possible to discharge the carbide to the outside from the lower end of the second conductive section 43 via the slit 43b of the second conductive section 43. Thereby, the carbide is prevented from being ejected between the second conductive sections 43 adjacent to each other. As a result, it is possible to effectively prevent the lowering of the insulation resistance between the respective second conductive sections 43 due to the carbide.

Description

200944322 VI. Description of the Invention: [Technical Field] The present invention relates to a laser welding method used in, for example, a Tailei protection element, in connection with a final connection, a prior art, a prior art, a second insertion device The connector used in the system is provided with 11 cores for connection to the connection object, and a plurality of terminals are arranged at intervals in the direction in which the surface is connected to each other. Increased transmission capacity of the connector body and the increase in the amount of AA 'The various high-speed voltages of 11 pieces cause the electronic components to be destroyed. (4) Positioning causes the wiring machine such as the connection 11 to be multi-polarized. Therefore, in order to avoid the transitional electricity, many protection devices are installed. The current situation is that the small machine wire has been made smaller on the circuit substrate. Therefore, by replacing the voltage protection element in the connector, the green of the part of the board is installed. The first conductive portion of the terminal for connecting the grounding (gr〇und) is connected to the plurality of second conductive portions connected to the plurality of signal line terminals, and When the varistor body between the first conductive portion and each of the second conductive portions generates a transient voltage in a circuit connecting the terminals for the signal lines, the varistor turns on the signal line for the dice and the ground terminal. The transition voltage is externally discharged by the grounding terminal (see, for example, Japanese Laid-Open Patent Publication No. 2006-140344). "But =, due to the miniaturization and multi-polarization of the connector, many of the signal line terminals will be arranged in two densities." With the second conductive portion of the transition voltage protection element, it is also necessary to use a strip-shaped metal sheet with a small width. The thin strip-shaped metal sheet is formed by, for example, YAG laser welding, and the laser is increased for the purpose of soldering. 200944322 The metal sheet with a small %' width is damaged or defective due to laser light before soldering. Therefore, it is known that there is a laser welding method in which the surface of the thickness direction of the thin metal plate is irradiated with laser light by a film of a resin having a high laser-rate yield, and the laser light absorption rate of the film can be improved. It is not necessary to increase the output of the laser for soldering (refer to, for example, Japanese Laid-Open Patent Publication No. 2001-87877). t _ _ ^ When the film is incident on the laser light, the hot and carbonized film resin of the laser is removed from the film. The gap between the metal sheets is between the adjacent metal sheets, and the gap between the gold sheets and the strips is reduced by carbides. 10 [Invention] In view of the above problems A laser welding method is provided, the purpose of which is that when a thin laser is irradiated, the carbide generated by the heat of the laser is ejected between the metal sheets. ^ In order to achieve the foregoing object, the present invention is a mine. The radiation-welding method is a film-like surface composed of an organic material having a high absorptivity of laser light across a surface of a plurality of strip-shaped metal sheets which are arranged at intervals in the width direction. The film is irradiated with laser light, thereby soldering a laser welding method of a welding object and a metal thin plate disposed on the other side of the thickness direction of the thin metal plate, wherein the respective metal thin plates are disposed from the welding position to the end of the metal thin plate The elongated hole or groove' is irradiated with laser light at the welding position of the film to weld the metal thin plate and the object to be welded. Thereby, the film of the laser light incident portion is carbonized by the laser heat energy and is carbonized by the welded portion. "The carbide will be released from the end of the metal sheet to the outside by the long hole or groove of the thin metal plate, so the carbide will not be ejected between the adjacent metal sheets." Moreover, in order to achieve the above object, the present invention is a laser welding method in which the surface of one of the plurality of strip-shaped metal sheets arranged in the width direction is spaced apart from each other in the thickness direction, and the absorption rate by the laser light is interposed. High organic composition 5 200944322 2=The film is irradiated with laser light, thereby welding the thickness direction of the metal thin plate and the laser hybrid method of the object and the metal thin plate, and the connection position is arranged between the thickness direction of the thin plate through the object ',, the welding position of the laser welding metal test and the welding to the welding light part of the _ by the cycling energy and carbonization of the 'carbide is still released to the outside through the hole of the film, so the stone reaction will not spray Between the adjacent metal sheets. ❹ 秘 Secret fii invention, carbon generated by laser heat when laser light is incident on the film [Embodiment] The tenth embodiment shows the first embodiment of the present invention. The connection shown in the figure is the same as that of the other side connector (not shown) in the main body 1G and the connector main body 1G. The holding member of the holding member 3, and the electric power is generated, and the transition voltage of the terminal 20 and the connector body 1 is electrically connected to each other. The connector body 10 is formed of an open metal member on the front side and the back side, respectively. The front _σ portion forms a counterpart connector insertion port. The both sides of the connector body 1G in the width direction are extended downward. The ground connection portions 1 are assembled into a body. The ground connection portions u are connected to the ground portion of the circuit substrate not shown in the ®. Further, the transition body voltage protection projections 12 are provided at both ends in the width direction of the back side of the connector body ω. Each of the terminals 20 is composed of a conductive metal member elongated in the front-rear direction, and a contact portion 21 that comes into contact with the terminal of the counterpart connector is formed on the distal end side. Each of the terminals and the rear end side of the second side is provided with a vertical portion 22 which is bent downward, and a board connecting portion 22 which is extended from the lower end of the vertical portion 22 to the rear of the 200944322, and a signal-dedicated conductive portion of the circuit board of the substrate connecting portion 22. The connection is not shown in the figure. The component 3G is composed of an insulating member such as a synthetic resin. The holding member 30 is provided with a terminal t^3 which is extended to the front in a see-saw shape. 1' Each terminal 2 is disposed on the lower surface side of the terminal support portion 31. The contact plate A has an earth plate 41 as a horizontally long film-like member, and a first guide 形成 formed by the face of the substrate 41 = a plurality of second conductive portions 43 The variable resistor 44 interposed between the first "components" and the substrate 41 covered with the varistor 44 are organic substances having a high laser light absorption rate (for example, poly-bright y^e, PI) The synthetic resin is formed so as to have a notch portion 4U at both ends in the width direction of the two earth plates 41, and the protrusions 12 of the notch portion of the panel connector body 10 are engaged with each other. /, The first conductive portion 42 It is formed of a thin metal plate having a thickness of 4 Å or less formed on the surface of the substrate 41 side, and is continuously formed in the longitudinal direction from the both end sides to the upper end side in the longitudinal direction of the substrate 41. The second conductive portions 43 are formed continuously. And the first conductive portion 42A, which is composed of a thin metal plate having a thickness of 40 or less, which is formed by the surface of the substrate 4, and is disposed on the lower end side of the end face and the upper side in the width direction, and is in the width direction. Each of the second conductive portions 43 is formed to extend in the up and down direction, and has a width The upper end of each of the second conductive portions 43 and the first conductive portion 42 are separated by a gap 4 of 4 μm or less. For example, the gaps 43a are arranged on the straight line along the longitudinal direction of the substrate 41. Further, each of the second conductive portions 43 is provided with a long hole 43b extending in the vertical direction, and the lower end side of each long hole is formed to be open to the lower end of the second conductive portion. The position is formed by shifting the length of the second conductive portion 43 one by one and the upper portion 7 200944322, and the upper end position of each long hole 43b is a welding position to be described later. That is, each of the second conductive portions 43 is alternately provided. The long holes 43b long in the up-and-down direction and the long holes 43b of the new ones are formed by etching together with the first and second conductive portions 42, 43. The variable resistor 44 is made of, for example, nonlinear It is formed of a known material of a resistive material, and has a property of high electrical resistance when a transient voltage is not generated, and a material which is activated when a transient voltage is generated and immediately becomes a low electrical resistance. Further, if it has the same property , you can also use other The material of the type is variable, and the body 44 is formed in a line shape extending in the longitudinal direction of the substrate 41 so as to cover the gap 43a of each of the second conductive portions 43, as shown in the second figure, even in the respective gaps 43a. In this case, the variable resistor 44 is formed by coating or printing a liquid material on the substrate 41 and curing it, and forming a linear shape extending along the longitudinal direction of the substrate 41. The coated member 45 is made of a uric acid. The insulating member such as urethane is formed so as to cover the varistor 44 so as to extend in the longitudinal direction of the substrate 41. The transient voltage protection element 40 having the above configuration is disposed in the connector. The back side of the main body Q 10 is joined to the rear end faces of the respective terminals 20 & the vertical portion 22 and the connector body 1 by conventional YAG laser welding, and is attached to the connector. That is, when the transition voltage protection element 40 is mounted, as shown in FIG. 6, the transition voltage protection element 40 is disposed on the back side of the connector body 1A with the substrate 41 as the back side, and the substrate 41 as shown in the seventh figure. Each of the notch portions 41a is individually engaged with each of the projections 12 of the connector body 10. Thereby, each of the second conductive portions 43 of the transient voltage protection element 4A is disposed to individually correspond to the vertical portion 22 of each terminal 2A. As shown in the eighth diagram, the YAG laser light (L) of the wavelength l〇64 nm is not perpendicular to the surface (back side) of the second conductive portion 43 in the thickness direction from the substrate 41 side with a predetermined pulse width. And prescribed rounds of exposure. Thereby, the resin of the incident portion of the laser light of the substrate 41 is carbonized by the thermal energy of the laser, as shown in the ninth figure.

The black portion B that is blackened is formed. In this case, because of the color of the neighboring B; genus = rapid seam. Next, as shown in the tenth figure, the metal thin plate of the first electric power unit 43 reaches the terminal % t, and the metal thin plate of the second conductive portion 43 is disposed in the direction of the ϋ τ ϋ 4 The vertical direction I of the terminal 2〇 on the one side (front side) is known. In this case, as shown in the fifth figure, the welded portion w is the second guide rail 43. The two conductive portions are soldered to the respective terminals 20', whereby the respective soldering w is formed at the upper end position of each of the long holes 43b of the second conductive portion. At this time, when the incident portion of the laser light is carbonized by the heat energy generated by the field, The carbide will be ejected from the welded portion, but as shown by the solid arrow in the figure, the carbide will be discharged from the lower end of the second conductive portion to the outside of the substrate 41 by the long hole, so that the carbide does not spray the second conductive portion. Further, the surface (back side) of one side in the thickness direction of the first conductive portion 42 corresponding to the wide side of the connector body 1 () is irradiated with laser light from the side of the base 14 side, thereby soldering with the former Langshi The first end surface of the main body 10 of the first conductive portion 42. /, ° 安装 is mounted with the aforementioned transient voltage protection element 40 In the connector, the substrate connection portion and the ground connection portion (4) of each terminal=20 are soldered to the circuit substrate not shown in the drawing. Therefore, the terminals 2 are connected to the circuit pattern of the circuit board, and the ground connection portions 11 are connected. In the grounding portion of the circuit board, the insertion port l〇a of the body 10 is inserted into the connector of the other side not shown in the figure,

The contact portion 21 of each terminal 20 contacts the terminal of the counterpart connector, and the disk connector is electrically connected. In the above connector, when a transient voltage such as static electricity is generated on the connector side of the partner side, a transition voltage protection element is provided between the terminal 2A of the signal line for generating the transient voltage and the connector body 10. 40 is turned on, and the circuit on the circuit substrate side is protected from the transition voltage. That is, the signal line of the other side connector is generated. 200944322 t: The variable resistor body 44 is immediately changed to a low-resistance material. The grounding connection portion of the connection (4) is "==$ ground side. In this case, the dragon-dependent (four) gap of the variable resistor body 44 is implemented, such as gold (four), the second conductive portion of her combination is opposite The long hole 43b of the second conductive portion 43 is elongated, and the terminal 20 is such that the laser light enters the portion of the tree =: the binary portion emits carbide, and even then, the carbonized hole 43b can be made from the second The lower end of the conductive portion 43 is outwardly directed. Thereby, the carbide is not ejected between the adjacent second conductive portions 43, and Z effectively prevents the insulation resistance between the second conductive portions 43 due to the carbide. In this case, the second conductive portion 43 is separated by a thickness of G.lmm or less of the substrate, which is composed of a thickness of G.lmm or less. It is not necessary to increase the thickness of the laser. The thin metal plate with a small width of the conductive portion 43 can also be used for the transition voltage of the small connector of the high-density arrangement of the terminals 20, and the member 40 is connected to the scale. It is extremely advantageous. # H Absorption rate of laser light which is composed of organic matter and is carbonized into black L field by laser light. In order to improve the productivity, it is not necessary to additionally perform the treatment for increasing the absorption rate. The thickness of the second conductive portion 43 is 4 〇 〇, width 5 〇 _ ^ $, and YAG having a wavelength of 1064 nm is used. The usual soldering method of the laser may cause damage to the thin metal plate, and the soldering method of the present embodiment is extremely advantageous for the metal thin plate of this size. 200944322 Further, the second conductive portion 43 will be used as the metal thin plate. The substrate 41 of the device is formed as a body, and the side of the substrate is optically spliced. The advantage is that the substrate yield of each of the second conductive portions 43 can be maintained, and it is not necessary to add a film-like member to the substrate 41. 'When the substrate 41 is aligned in the width direction, a plurality of centering-parts are welded ==, and the bonding position is shifted toward the longitudinal direction of the second conductive portion 43. Therefore, when the V electrical portion 43 approaches in the width direction, φ can be added. When the second conductive portion 43 has a high density, it is easy to discharge some carbide between the adjacent second conductive portions 43 due to soldering. ^ ί = 43 is offset in the length direction 'so * will be _ from the first adjacent to each other. Further, since the welding position is shifted in the longitudinal direction of each of the electric wires 4 43 , it is effective for preventing the substrate 41 from being separated from the case where the welding position is disposed. The tenth to thirteenthth drawings show the components of the embodiment of the present invention which are equivalent to each other and are displayed using phase symbols. In the long hole 43b through which the second conductive portion 43 penetrates in the thickness direction, instead of the long hole view of the first embodiment, the second conductive portion 43 is slid in the second conductive portion. The groove is not penetrated in the thickness direction, and the groove 43c extends to the end of the second conductive portion 43. The φ 立 can release the carbide from the nozzle of the welded portion from the second guide H to the outside through the groove 43c. Therefore, similarly to the first embodiment, the adjacent product is prevented from being ejected, and the stone reversal can be effectively prevented. The resulting decrease in insulation resistance between the respective second conductive portions 43. The components of the first embodiment, such as the first embodiment, are shown by the same reference numerals. In the present embodiment, instead of the long hole yang of the first embodiment, a vertically long hole 43d through which the _41 penetrates in the thickness direction is provided between the welding positions of the substrate 41 (film), and each of the substrates 41 is opposed to each other. The laser beam is incident on the contact position, and each of the second conductive portions 43 is soldered to each of the terminals 2A. Thereby, as shown by the solid arrows in FIG. 16, the carbide ejected from between the substrate 41 of the welded portion and the second conductive portion 43 can be released from the hole 43d of the substrate 41 to the outside. - In the case of a solid state, the carbide is not sprayed between the adjacent second conductive portions 43, and the insulation resistance between the first conductive portions 43 due to carbon recording can be reduced. Further, in the above embodiments, the connector connected to the counterpart connector may be connected to a flexible printed circuit (FPC: Flexible Printed Wiri%).

Board) or a connector such as a flat cable (FFC: Flexible). Further, in each of the above embodiments, the welding method of attaching the transient voltage protection element 4 to the connector is shown. If the metal thin plate is welded, the present invention can be used for various types of welding for other purposes. In this case, it is possible to form a film by applying a black paint to the joint of the thin metal plate, for example, without using the substrate 41 as the film-like member as in the above embodiment.

BRIEF DESCRIPTION OF THE DRAWINGS The first drawing shows a front view of a first embodiment in which a transient voltage protection element is mounted to a connector in accordance with the welding method of the present invention. 3 The first figure is a side cross-sectional view of the transition voltage protection component. The third figure is an exploded perspective view of the transition voltage protection component. The fourth figure is a side cross-sectional view of a connector with a transitional voltage protection element. ° A diagram showing the connector of the installation procedure for the transition voltage protection component. 'The fifth picture is a rear view of the connector with the transition voltage protection element. Figure 6 Front side perspective The seventh diagram shows the connector for the installation procedure of the transition voltage protection component. 12 200944322 Rear side perspective view. The eighth embodiment shows the important part of the welding program connector of the present invention, and the ninth embodiment of the connector of the welding program of the present invention is shown in the second embodiment of the main part of the connector of the welding program of the present invention. Welding procedure connection

Tenth is a cross-sectional view showing an important part of the connector of the welding procedure of the present invention. J

The cross section of the important portion of the connection 11 of the present invention is shown in section (4), and the important portion of the transmission 11 of the welding procedure of the present invention is shown.

The welding method according to the present invention (4) The voltage protection of the second embodiment of the connector. I 2 Fifteen is a side cross-sectional view of a transition voltage protection element. Figure 16 is a rear view of the main part of the transition voltage protection component. [Description of main component symbols] 10 Connector body l〇a connector insertion port 11 Ground connection portion 20 Terminal 21 Contact portion 22 Vertical portion 3〇 Holding member 31 Terminal support portion 40 Transition voltage protection element 13 200944322 41 Substrate 41a notch 42 First conductive portion 43 second conductive portion 43a gap 43b long hole 43c groove 43d long hole 44 variable resistor body 被 45 coated member

Claims (1)

200944322 VII. Scope of application for patents: Divide the light in two directions, so as to weld the thin metal of the metal, thin and thin f (41) into the laser welding of the elephant (metal thin _==^) = County _ with her _3) County Wei Wei direction welding position between the thin film (9) thickness of the metal sheet (43) and the welding pair ^ =) 峨 touch field make 3 use thick as ===== skill 'The characteristics are: 4 ^ by · ^ material parts for the riding film (41). The absorption rate of the laser light. Blackening, to mention (four) film (41) Patent range No. 1 or 2 of the laser splicing method, characterized by: = thin metal thickness of the wire thickness of the following m, width 5 Qing: the range of the first Or the laser welding method of item 2, characterized in that: the surface of the thickness direction of the special plate (43) is the surface of the film (four) 15 200944322 ❹ As a whole, laser light is incident on the welding position of the film (μ) to weld the thin metal plate (43) and the object to be welded (20). 7. The laser welding method according to claim 6, wherein the welding position of the portion of each of the welding positions is welded with respect to the longitudinal direction of the metal thin plate (43) of the other welding position. 16